washed out textures in render
Your environment lighting (world and light) was very bright. So first thing, change your lighting. Also, your coffee material has a Transmission of 1, which makes it reflect the environment like a glass, and a Roughness of 0.55, which makes the reflection scattered all over the surface, it's not what you expect from water, and it creates a rather grey material, you can't see the Volume Absorption effect any more.

If you don't want this scattering effect, which would make more sense, low down the Roughness value:

You can also mix your BSDF with a Transparent node to lown down the glass effect: